I have two questions regarding coral reef and volcanic islands.

When a new volcanic island is formed, how much time generaly passes before a coral reef starts to form around the island?

Another question: Are there any volcanic islands in warm pacific waters which do not show fringing or a barrier reef? If so, is this because the island was formed recently and is still too hot for a coral reef to flourish?

  • $\begingroup$ Please edit your question to make which does not Fringing or barrier reef clear... $\endgroup$ – Jan Doggen May 22 at 10:08
  • $\begingroup$ @david welcome to Stackexchange! I've edited your question to tidy up the English a little. I think that I have maintained your intended question, but if I haven't then I apologise, and please either tell me here, or edit it yourself. $\endgroup$ – Semidiurnal Simon May 23 at 16:59
  • $\begingroup$ This article says "However, they grow very slowly—anywhere from 0.3 cm to 10 cm per year The reefs we see today have been growing over the past 5 000 to 10 000 years". $\endgroup$ – Keith McClary May 24 at 1:35
  • $\begingroup$ I read the article. Thanks Keith! $\endgroup$ – David May 24 at 7:02

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